Micro R&D: Pyramid Sound Enhancer

The Sound Enhancer is not strictly a sound card, but it is designed to
drastically improve audio quality. It probably works in a very similar
manner to the Sound Enhancer made by Omega. It works on the theory that
the human ear has an uneven sensitivity to sound in the ranges of 20Hz
to 20Khz. The Sound Enhancer capitalises on this by boosting the
frequencies the ear is more sensitive to in relation to the other
frequencies, producing a better quality sound output.